aFe Magnum FLOW Pro DRY S Air Filters 21-91103 Sierra Marine Alternators The smooth transition maintains exhaust

The smooth transition maintains exhaust gas velocity for improved scavenging across the power band

The knurled outer surface provides a secure grip even with oily hands or gloves

All brackets

The 12-gauge construction provides long-term durability

Product 26370 is verified for correct specifications and dimensional accuracy before shipment

aFe Magnum FLOW Pro DRY S Air Filters 21-91103 Sierra Marine Alternators The smooth transition maintains exhaustThis aFe Pro Dry S drop in air filter element (SKU: afe magnum flow pro dry s air filters 21 91103) is a direct replacement for vehicles requiring part number 21 91103 that swaps out your restrictive OEM paper filter for a high flow performance alternative. It is one of the simplest upgrades you can make to your engine's air intake system, delivering sharper throttle response and measurable gains without any modifications. The Pro Dry S uses three